.box {
    width: 100%;
    height: 70px;
    display: flex;
    align-items: center;
    z-index: 9999;
    position: fixed;
    left: 0;
    top: 0;
    background: #000;
    color: #fff !important;
}

.top {
    width: 80%;
    height: 100%;
    display: flex;
    margin-left: 120px;
    position: relative;
}

h1 {
    width: 100px;
    height: 70px;
    margin-left: 30px;
    display: flex;
    justify-content: center;
    align-items: center;
    img {
        width: 65%;
        height: 65%;
    }
}

.top>ul {
    /* background: #fcc; */
    height: 70px;
    display: flex;
    margin-left: 55px;
    width: 45%;
    align-items: center;
    justify-content: space-evenly;
}
.top>ul>li{
    /* background: red; */
    width: 100%;
    height: 70px;
    display: flex;
    justify-content: center;
    align-items: center;
}
.top>ul>li>a {
    color: #fff!important;
}

.top>ul>li>a>span {
    transition: transform 0.3s ease;
}

.top>ul>li:hover a span {
    transform: rotate(180deg);
    transition: transform 0.3s ease;
}

.top>ul>li:hover a {
    font-weight: bolder;
}

.zhe {
    position: relative;
}

.top>ul>li>.Mask {
    position: absolute;
    left: -120px;
    top: 70px;
    width: 1573px;
    height: 500px;
    background: #fff;
    display: none;
    color: #000;
}

.top>ul>li:hover .Mask {
    display: block;
    z-index: 9999;

}

.maskone {
    /* border: 1px solid #000; */
    margin-top: 35px;
    margin-left: 40px;
    margin-right: 100px;
}

.maskone>ul>li {
    /* border: 1px solid #000; */
    width: 30%;
}

.maskone>ul {
    display: flex;
    margin-bottom: 25px;
    justify-content: space-between;
}

.masktu {
    display: flex;
    margin-left: 20pxs;
}

.masktu .left {
    width: 70%;

    h3 {
        line-height: 80px;
        margin-left: 20px;
    }

    ul {
        /* border: 1px solid #ccc; */
        margin-bottom: 20px;
        width: 90%;
        margin-left: 20px;
        display: flex;
        justify-content: space-between;
        align-items: center;

        li {
            width: 30%;
            height: 120px;
            /* border: 1px solid #000; */
            display: flex;
            justify-content: space-around;
            align-items: center;
        }
    }

}

.masktu .right {
    flex: 1;

    img {
        width: auto;
        height: 400px;
        margin-top: 25px;
    }
}

.btn {
    background: #2254f4;
    border: none;
    width: 100px;
    height: 35px;
    border-radius: 2px;
    color: #fff;
}